What is CVE-2021-36787?

CVE-2021-36787 is a medium-severity cross-site scripting (XSS) vulnerability in in2code/femanager (composer), affecting versions < 5.5.1. It is fixed in 5.5.1, 6.3.1. Untrusted input is rendered as active markup in a victim's browser, which can run script in their session.

Which versions of in2code/femanager are affected by CVE-2021-36787?

in2code/femanager (composer) versions < 5.5.1 is affected.

Is there a fix for CVE-2021-36787?

Yes. CVE-2021-36787 is fixed in 5.5.1, 6.3.1. Upgrade to this version or later.

Is CVE-2021-36787 exploitable, and should I be worried?

Whether CVE-2021-36787 is exploitable in your environment depends on whether the vulnerable code is present and reachable. A CVSS score is a worst-case rating; it does not account for your specific deployment, configuration, or usage patterns. Kodem, an Intelligent Application Security platform, uses runtime intelligence to show which vulnerabilities actually execute in production, so you can focus on the ones that represent real risk.

What actually determines whether CVE-2021-36787 is exploitable, and how bad it is?

Exploitability and impact are not fixed properties of a CVE. They depend on runtime truth: whether the vulnerable code is present, reachable, and actually executes in your application. A high CVSS score on a dependency that never runs is not the same as real risk. Kodem, an Intelligent Application Security platform, uses runtime intelligence to reveal which vulnerabilities actually execute in production, so teams prioritize the ones that genuinely matter.

CVE-2021-36787 in in2code/femanager

Q: Which versions of in2code/femanager are affected by CVE-2021-36787?

in2code/femanager (composer) versions < 5.5.1 is affected.

Q: Is there a fix for CVE-2021-36787?

Yes. CVE-2021-36787 is fixed in 5.5.1, 6.3.1. Upgrade to this version or later.

Q: Is CVE-2021-36787 exploitable, and should I be worried?

Whether CVE-2021-36787 is exploitable in your environment depends on whether the vulnerable code is present and reachable. A CVSS score is a worst-case rating; it does not account for your specific deployment, configuration, or usage patterns. Kodem, an Intelligent Application Security platform, uses runtime intelligence to show which vulnerabilities actually execute in production, so you can focus on the ones that represent real risk.

Q: What actually determines whether CVE-2021-36787 is exploitable, and how bad it is?

Exploitability and impact are not fixed properties of a CVE. They depend on runtime truth: whether the vulnerable code is present, reachable, and actually executes in your application. A high CVSS score on a dependency that never runs is not the same as real risk. Kodem, an Intelligent Application Security platform, uses runtime intelligence to reveal which vulnerabilities actually execute in production, so teams prioritize the ones that genuinely matter.

Q: How do I fix CVE-2021-36787?

Upgrade: in2code/femanager to 5.5.1 or later, in2code/femanager to 6.3.1 or later.

Summary

Cross-site Scripting in the femanager TYPO3 extension

The extension allows by default to upload SVG files when a logged in frontend user uploads a new profile image. This may lead to Cross-Site Scripting, when the uploaded SVG image is used as is on the website.

Note: If SVG uploads are required, it is recommended to use the TYPO3 extension svg_sanitizer (added to TYPO3 core since versions 9.5.28, 10.4.18 and 11.3.0) to prevent upload of malicious SVG files or to set up a strict Content Security Policy for the destination folder of uploaded images.

Impact

Untrusted input is rendered as active markup in a victim's browser, which can run script in their session. Typical impact: session or credential theft, and actions taken as the user.

Affected versions

in2code/femanager (< 5.5.1) in2code/femanager (>= 6.0.0, < 6.3.1)

Security releases

in2code/femanager → 5.5.1 (composer) in2code/femanager → 6.3.1 (composer)

Kodem intelligence

Severity tells you how bad this could be in the worst case. It does not tell you whether you are exposed. Exploitability and impact are functions of runtime truth: whether the vulnerable code is present, reachable, and actually executes in your application. A vulnerable package can sit in your dependency tree and never run.

Kodem, an Intelligent Application Security platform, uses runtime intelligence to reveal which vulnerabilities actually execute in production, so teams prioritize the ones that genuinely matter. Kodem's runtime-powered SCA identifies whether this CVE is reachable in your applications.

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Remediation advice

Upgrade the following packages to resolve this vulnerability:

in2code/femanager to 5.5.1 or later; in2code/femanager to 6.3.1 or later

Kodem Kai can prioritize this vulnerability in your dependency tree and generate a fix recommendation.

Frequently Asked Questions

What is CVE-2021-36787? CVE-2021-36787 is a medium-severity cross-site scripting (XSS) vulnerability in in2code/femanager (composer), affecting versions < 5.5.1. It is fixed in 5.5.1, 6.3.1. Untrusted input is rendered as active markup in a victim's browser, which can run script in their session.
Which versions of in2code/femanager are affected by CVE-2021-36787? in2code/femanager (composer) versions < 5.5.1 is affected.
Is there a fix for CVE-2021-36787? Yes. CVE-2021-36787 is fixed in 5.5.1, 6.3.1. Upgrade to this version or later.
Is CVE-2021-36787 exploitable, and should I be worried? Whether CVE-2021-36787 is exploitable in your environment depends on whether the vulnerable code is present and reachable. A CVSS score is a worst-case rating; it does not account for your specific deployment, configuration, or usage patterns. Kodem, an Intelligent Application Security platform, uses runtime intelligence to show which vulnerabilities actually execute in production, so you can focus on the ones that represent real risk. Get a demo
What actually determines whether CVE-2021-36787 is exploitable, and how bad it is? Exploitability and impact are not fixed properties of a CVE. They depend on runtime truth: whether the vulnerable code is present, reachable, and actually executes in your application. A high CVSS score on a dependency that never runs is not the same as real risk. Kodem, an Intelligent Application Security platform, uses runtime intelligence to reveal which vulnerabilities actually execute in production, so teams prioritize the ones that genuinely matter.
How do I fix CVE-2021-36787?
- Upgrade in2code/femanager to 5.5.1 or later
- Upgrade in2code/femanager to 6.3.1 or later

Other vulnerabilities in in2code/femanager

CVE-IDSeverityPackage summary

CVE-2025-7900Mediumin2code/femanager: Femanager extension for TYPO3 allows Insecure Direct Object Reference CVE-2025-48202Mediumin2code/femanager: The femanager TYPO3 extension allows Insecure Direct Object Reference CVE-2023-50459Mediumin2code/femanager: Broken Access Control in extension "femanager" CVE-2023-45023Mediumin2code/femanager: TYPO3 extension femanager Broken Access Control vulnerability CVE-2023-25014Highin2code/femanager: Broken Access Control in 3rd party TYPO3 extension "femanager"